I have a 97 Grand Voyager with 117000 miles. Twice, only twice, the most recent just yesterday the ABS light came on. This first happened a few months ago. I came on when I started the car and stayed on. I restarted it and it went off. Yesterday, 150 miles into a 600 mile trip it came on again. I decided it was time for a break. When I restarted the vehicle it went off again. Any ideas?